#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2023, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

# mkimage size format host:remote_system_ds/disk.i vmid dsid
#   - size in MB of the image
#   - format for the image
#   - host is the target host to deploy the VM
#   - remote_system_ds is the path for the system datastore in the host
#   - vmid is the id of the VM
#   - dsid is the target datastore (0 is the system datastore)

SIZE=$1
FORMAT=$2
DST=$3

VMID=$4

if [ -z "${ONE_LOCATION}" ]; then
    TMCOMMON=/var/lib/one/remotes/tm/tm_common.sh
else
    TMCOMMON=$ONE_LOCATION/var/remotes/tm/tm_common.sh
fi

DRIVER_PATH=$(dirname $0)

. $TMCOMMON

source ${DRIVER_PATH}/../../etc/datastore/datastore.conf

#-------------------------------------------------------------------------------
# Set dst path and dir
#-------------------------------------------------------------------------------
DST_PATH=`arg_path $DST`
DST_HOST=`arg_host $DST`
DST_DIR=`dirname $DST_PATH`

DISK_ID=$(echo $DST|awk -F. '{print $NF}')

#-------------------------------------------------------------------------------
#  Get Image information
#-------------------------------------------------------------------------------

XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"

unset i j XPATH_ELEMENTS

while IFS= read -r -d '' element; do
        XPATH_ELEMENTS[i++]="$element"
done < <(onevm show -x $VMID | $XPATH  \
                            /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/FS)

FS="${XPATH_ELEMENTS[j++]}"

#-------------------------------------------------------------------------------
# Make the new image (file-based)
#-------------------------------------------------------------------------------
ssh_make_path $DST_HOST $DST_DIR

set -e -o pipefail

FS_OPTS=$(eval $(echo "echo \$FS_OPTS_$FS"))
MKFS_CMD=`mkfs_command $DST_PATH $FORMAT $SIZE "$SUPPORTED_FS" "$FS" "$FS_OPTS"`

MKSCRIPT=$(cat <<EOF
export PATH=/usr/sbin:/sbin:\$PATH
$MKFS_CMD

rc=\$?

if [ "\$rc" != "0" ]; then
    rm -f $DST_PATH
fi

exit \$rc
EOF
)

log "Making image of ${SIZE}M and type $FORMAT at $DST"

ssh_exec_and_log $DST_HOST "$MKSCRIPT" "Could not create image $DST_PATH"

exit 0
